Pain on the right side of neck?

I'm not quite sure what happened, but about 2-3 hours ago, I was sitting down in my chair and I was slouching some. I believe in the process, I may have put my neck at the top right corner of the chair, it's some type of hard sewn like fabric, with the pole there at the end. I remember getting up and having immediate pain in my neck. I can feel the pain when I'm just looking straight forward, and as I gradually move to the right, it becomes more severe, and becomes almost unbearable at about 2-3 inches to the right. I can move my head all the way to the left while feeling almost nothing so it's definitely only on the right side.I told my mom about this, and she said it's probably just tight muscles or something, and she gave me some stuff called muscle rub to rub in around the area to try and ease the pain. This was about 30 minutes ago and there's no improvement. Also, if I make any sudden movements with my head in any direction, than I'll get a strong shot of pain on the entire right side of my neck. Does anyone have any ideas of what may be wrong? I'd really rather avoid the hospital, and she won't take me anyhow so I'm pretty much stuck. (Still under 18)